共查询到19条相似文献,搜索用时 187 毫秒
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穆斯堡尔谱的测量通常有透射法和背散射法,使用的探测器有闪烁计数器和正比计数器等。如常用~(57)Co作穆斯堡尔源时,透射法是用闪烁计数器或正比计数器测量无反冲吸收后被吸收体~957)Fe核放出的X射线。背散射法是用正比计数器,可测量放出的K壳层X射线或内转换电子,测量背散射穆斯堡尔谱是研究固体表面物理性能的有用方法,近几年来发展很快,应用在簿膜的结构和性质的研究,表面化学和冶金、扩散、腐蚀和离子注入等诸方面的研究。 相似文献
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用双道液体闪烁计数器测量尿中氚 总被引:4,自引:0,他引:4
尿中氚的测量方法有正比计数管、盖革-弥勒计数管、电离室和液体闪烁计数器等,其中以正比计数管方法的测量灵敏度为最高。前三种方法,由于制样和操作比较繁杂,又不宜于大量样品的分析测量,因此目前没有广泛采用。而液体闪烁计数器,测量灵敏度适中, 相似文献
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介绍了在4π高气压正比计数器与碘化钠闪烁计数器符合装置上测量电子俘获核素 ̄(57)Co的效率外推法。测定了不同充气压力和不同工作电压对测量结果的影响。衰变率的合成不确定度为0.4%。这一方法也可用于具有类似衰变图的低Z电子俘获核素的测量。 相似文献
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吴学周 《核电子学与探测技术》1991,11(1):46-51
效率示踪法是由Campion提出并发展的。本文描述了效率示踪法的原理、局限性;效率示踪法在液体闪烁计数器中的应用。Packard液体闪烁计数器中ET测量结果也作了介绍。 相似文献
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正比计数器具有气体放大作用,很适合用于低能粒子探测.用于低能X射线和α/β污染监测时,正比计数器按充气方式可以划分为两大类:流气式和闭气式.与流气式相比,闭气式正比计数器使用方便;但是其寿命比较短,需要周期性更换工作气体.介绍了闭气式正比计数器性能老化问题,以及一种改善其换气周期的方法. 相似文献
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A driftless gas scintillation proportional counter is described. The instrument has several advantages over conventional GSPCs especially for applications at low x-ray energies (~0.l - 30 keV) and small dimensions such as imaging focal plane detectors for x-ray telescopes or concentrators. The x-ray astronomy satellite project SAX has such a requirement and an imaging GSPC of this configuration is presented in this context. 相似文献
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本文综述了人工神经元网络(ANN)在核电工程中的应用现状,包括,报警处理和故障诊断;热功率预测,传感信号的有效性确认;核电厂运行变量的动态辨识;堆芯管理等其它方面。并分析了ANN应用于核电工程中的特点及前景,指出了今后有待解决的问题。 相似文献
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Jianping MaAuthor VitaeJin JiangAuthor Vitae 《Progress in Nuclear Energy》2011,53(3):255-266
Nuclear power industries have increasing interest in using fault detection and diagnosis (FDD) methods to improve safety, reliability, and availability of nuclear power plants (NPP). A brief overview of FDD methods is presented in this paper. FDD methods are classified into model-based methods, data-driven methods, and signal-based methods. While practical applications of model-based methods are very limited, various data-driven methods and signal-based methods have been applied for monitoring key subsystems in NPPs. In this paper, six areas of such applications are considered. They are: instrument calibration monitoring, instrumentation channel dynamic performance monitoring, equipment monitoring, reactor core monitoring, loose part monitoring, and transient identification. The principles of using FDD methods in these applications are explained and recent studies of advanced FDD methods are examined. Popularity of FDD applications in NPPs will continuously increase as FDD theories advance and the safety and reliability requirement for NPP tightens 相似文献
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戴贵亮 《核电子学与探测技术》1986,(6)
三、互连技术:总线与网络 如把处理机或计算机间的任何连接泛称为互连,则互连技术涉及的范畴将包括总线,局部网络与大范围网络。图5表示三者互连长度和数据传输率的复盖范围。 相似文献
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P.H. Hutton 《Nuclear Engineering and Design》1989,113(1)
Beneficial uses being made of acoustic emission (AE) technology for flaw or fault detection both inside of and outside of the nuclear industry tend to be obscured by some of the earlier disappointing efforts to utilize the technology. The objective of this paper is to counter that tendency by providing an overview of a variety of AE applications being made in the United States. In addition to nuclear power applications, the paper discusses applications in other nuclear areas, fossil power plant applications, and other industrial uses including aircraft monitoring. Major AE research and development programs in progress in the United States are also summarized. 相似文献
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光导体探测器及其在脉冲辐射测量领域中的应用 总被引:3,自引:1,他引:2
温树槐 《核电子学与探测技术》1995,15(4):246-253
本文介绍了在脉冲辐射测量领域迅速发展的一种新型探测器-ps光导体探测器,描述了它的基本原理,主要特性和应用。 相似文献
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FH1936型环境γ谱仪系统 总被引:1,自引:1,他引:0
王清芳 《核电子学与探测技术》1990,10(1):18-22
本文主要介绍了FH1936型环境γ谱仪系统的主要设置、技术特点、用途、功能及技术指标等。 相似文献